# -*- coding: UTF-8 -*-
from typing import List
from leetcode_helper import TestcaseHelper, SolutionBase


class Solution(SolutionBase):
    char_dict = {
        '(': ')',
        '[': ']',
        '{': '}'
    }
    # 解题的方法，命名和Leetcode的保持一致即可
    def isValid(self, s: str) -> bool:
        stack = []
        for ch in s:
            if ch == ')' or ch == ']' or ch == '}':
                if len(stack) == 0:
                    return False

                left = stack.pop()
                if ch != self.char_dict[left]:
                    return False
            else:
                stack.append(ch)

        return len(stack) == 0


if __name__ == '__main__':
    solution = Solution()

    # 按照leetcode的题目说明，将基本的test case填入
    # 每条case的最后一个元素是正确的结果，即期待的结果
    # 使用元组来保存输入的数据，期待的结果
    testcases = [
        ('()', True),
        ('()[]{}', True),
        ('(]', False),
        ('([)]', False),
        ('{[]}', True)
    ]

    for case_item in testcases:
        # 获取测试用的case和期待的执行结果
        input1 = case_item[0]
        expect = case_item[len(case_item) - 1]
        exec_result = solution.isValid(input1)

        # 判断执行结果，输出提示信息
        check_result = solution.check_result(expect, exec_result)
        TestcaseHelper.print_case(check_result, case_item, exec_result)

